Suppose a laboratory has a 26 g sample of polonium-210. The half-life of polonium-210 is about 138 days. How many half-lives of polonium-210 occur in 276 days? How much polonium is in the sample 276 days later?
2; 6.5 g
3; 3.25 g
2; 1,794 g
2; 13 g
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